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  1. #1

    Default 1988 Johnson 88HP trim/tilt connection

    I have removed the 88HP from one boat and installing on another.

    Can the tilt/trim connection be direct wired to operate from a dash mounted switch rather than use the wiring harness that includes relay.

    We have the harness with relay box, but not sure which wires go where for connection.

    All help will be appreciated

    1greenhornet

  2. #2
    Fleet Admiral HighTrim's Avatar
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    Default Re: 1988 Johnson 88HP trim/tilt connection

    What colour wires are coming off of the trim motor?

  3. #3

    Default Re: 1988 Johnson 88HP trim/tilt connection

    High Trim:

    The wires coming off the trim motor are blue / green.

    On the other boat I guess they were connected to a 4x6 box labled fuses inside.

    That box has out of it, a plug connector with blue / green wires
    a plug connector with 2 black wires
    a long battery connector cable
    a plug conector with blue/white, red/white,
    green/white
    a bare white/brown wire
    a bare black/brown wire

    Can you tell me how each of these wires should be used?

    Also, back to my original question, can they be by-passed our should they
    be passed or not?

    Or, what would you suggest?

    Thanks,

    1greenhornet

  4. #4
    Petty Officer 1st Class
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    Default Re: 1988 Johnson 88HP trim/tilt connection

    You didn't mention what motor you are replacing, but it sounds like an older motor with a three wire tilt motor. If that's the case, you have to use the relay set up, because the two wire tilt motor uses green and blue for both up and down. if green positive and blue negative, tilt goes down, if blue pos and green neg goes up. relays allow for this change in polarity.

  5. #5
    Fleet Admiral HighTrim's Avatar
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    Default Re: 1988 Johnson 88HP trim/tilt connection

    If you private me Ill send you all the wiring diagrams that you will need. Some are too large to put on this site, and are in pdf format so I cannot use photobucket as a host. The plug conector with blue/white, red/white, green/white wires are for the trim switch connections. Blue is up and green is down in these applications. It sounds though like you are trying to run a 2 wire motor on a 3 wire setup. The wiring diagram that you pic will more easily illustrate which you have and what you have to do to get it running.

  6. #6
    Fleet Admiral HighTrim's Avatar
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    Default Re: 1988 Johnson 88HP trim/tilt connection

    Is this the wiring set up on the new boat?

    Trim wiring.jpg

  7. #7

    Default Re: 1988 Johnson 88HP trim/tilt connection

    Thanks to HighTrim and Iceman, I have the wiring complete and all is working.

    1greenhornet

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